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'Iterator.next()' which can't throw 'NoSuchElementException'

Reports implementations of Iterator.next() that cannot throw java.util.NoSuchElementException.

Such implementations violate the contract of java.util.Iterator, and may result in subtle bugs if the iterator is used in a non-standard way.

Example:

class Numbers implements Iterator<Integer> { @Override public Integer next() { //warning if (hasNext()) { return generateNext(); } else { return null; //throw NoSuchElementException instead } } ... }

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

IteratorNextCanNotThrowNoSuchElementException
Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Java | Probable bugs

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.3, Qodana for JVM 2024.3,

Can be installed with plugin:

Java, 243.23126

Last modified: 03 December 2024